Loudspeaker



FIG. 1 is a front left perspective view of a loudspeaker;

FIG. 2 is front elevational view thereof; and,

FIG. 3 is a right side elevational view thereof.

The broken line shows on the drawing disclosure is for illustrative purpose only and forms no part of the claimed design. 

The ornamental design for a loudspeaker, as shown and described. 